.box{
    width: 800px;
    height: 1100px;
    background-color: antiquewhite;        
}
.box .zhuce li{
    width: 400px;
    height: 200px;
    position: relative;
}
.box input{
    margin-left: 50px;
    width: 200px;
    height: 30px;
}
.box ol{
    list-style: none;
}
.box .mask{
    width: 400px;
    height: 200px;
    border: solid 2px #ccc;
    position: absolute;
    top: 0;
    left: 82%;
    display: none;
}